To reduce the damage by vehicle-generated,the road-friendliness of a missile launcher with interconnected hydro-pneumatic suspension was studied based on co-simulation technology.A 6-DOF mathematics equation of 1/4 missile launcher was derived,pavement model was generated by using filter white noise method and co-simulation model considering tire nonlinear was established by using ADAMS/Simulink/AMESim measure.“95 percentage fourth power aggregate force” was used as the criterion for road-friendliness.The results show that the road damage coefficient can be significantly influenced by initial pressure,total volume of the accumulator and the diameter of damper-hole.If the missile launcher drives on the smooth road,the damage coefficient will grow slowly as speed increasing.Otherwise,the increase is obviously.Besides,lower tire stiffness can improve the road-friendliness.